Apparatus for matching the brake pressure of vehicle combinations to the actual load

Abstract

Apparatus for matching the brake pressure of vehicle combinations to the actual load comprising tranducers (36, 41) for adjusting the brake pressure of the units (10, 13) included in the vehicle combination, in dependence on pulling and pushing, respectively, of a coupling between the tractor vehicle and the trailer vehicle and in dependence on the loading of the vehicles.

I claim: 
     
       1. Vehicle combination comprising a tractor vehicle, a trailer vehicle, a coupling connecting said tractor vehicle to said trailer vehicle, air pressure brakes on said vehicles, air conduits for supplying pressurized air to said brakes, a transducer operatively connected to said coupling to provide a signal indicating pulling and pushing, respectively, of the coupling, a servo-regulator unit operatively connected to said air conduits for adjusting the pressure of pressurized air supplied to said brakes through said air conduits, and a central unit operatively connected to said servo-regulator unit and to said transducer for controlling said pressure in dependence on said signal provided by said transducer when the air pressure brakes of the vehicles are being actuated. 
     
     
       2. Vehicle combination as in claim 1 further comprising means in the tractor vehicle, operatively connected to the servo-regulator unit for shunting said unit when the trailer brake is actuated.